This research shows how the performance of the Precise Point Positioning (PPP) changes
with the development of GPS, GLONASS and Galileo systems. Calculations was performed …

The new generation of Android smartphones is equipped with high performance Global
Navigation Satellite System (GNSS) chips capable of tracking dual frequency multi …

对于实时精密单点定位用户, 一般需通过无线网络接入基于状态空间表述(SSR)
的差分改正数信息. 在实际应用中, 由通信链路不稳定导致精密轨道钟差改正数发生延迟的现象 …

The new generation of Android smartphones are equipped with high performance Global
Navigation Satellite System (GNSS) chips. These new chips are capable of tracking dual …

On August 2016, the Milena (E14) and Doresa (E18) satellites started to broadcast
ephemeris in navigation message for testing purposes. As the Galileo constellation is not yet …

For real-time (RT) precise point positioning (PPP), the state space representation (SSR)
information is often delayed due to possible communication delays and specific broadcast …

Over the last years, researchers are struggling to develop solutions and services for smart
and sustainable urban mobility creating dynamic shared spaces for both vehicles and …

Centimeter-level or better positioning accuracy is needed in engineering surveying
applications. When employing the Global Navigation Satellite System (GNSS) in …

The objective of this paper is to test in a degraded environment the performances of two
different type of low-cost GNSS receivers. The first one is a typical low-cost hardware: the u …

The next global strategic priority in space missions is a stable access to the Moon. Over the
last few years several studies and discoveries have pushed the space agencies and …